Method of recovering solutions.



vP.&TE`.1\T'IEI) NOV. 5, 1907. W. A. HBNDRYX. METHOD OF REOOVBRING SOLUTIONS.

APPLIOATION FILED APB.. 25,1907.

IVETLD EQQVERENG- SOLUTE'S.

ne. Brenes..

Speceasen olf dilettanti Patent.

atented Non'.v 5, 1&0?.

Application filed prilz. l'ltl'.` Serial No. 370319;

of recoveringlliquids from solids,` tliei method being particularly applicable to the recovery of solutions containing gold, silver, copper, or other metallic values dissolved in their respective solvents, from ore pulp. The method may be carried out in any suitable apparatus, as for instance in an apparatus of the character described in rny copending application Serial Nef 329,811, filed August 9, 1906.' A modified form of ap parat-ussuitable ,for carrying the invention into efiect is shown in theaccornpanying drawing, wherein the iigureis a central vertical section. i l

Referring to .the drawing, 1 represents a tank which may be of any suitable shape or dimensions, but is preferably rectangular, having a converging bottoni 2. Within the tank and preferably just above the bottom 2 arc arranged transverse timbers 3 carried by sockets 4 or otherwise hold, and serving to support a plurality of filters oi filter cells 5. in its preferred form each of these cells comprises a rectangular framework 6, conveniently of wood; filter bags 7 of canvas or other material are drawn over the frames 6, and their open ends secured by any suitable means1 Each filter cell has a suitable discharge 8 preferably at the bottoni of the frame, the several cells being shown as fconnected to a common main 9 terminating in an outlet 10.

In order to keep the Walls or' the cells distended under the weight of the material inthe tank l prefer'to provide in each cell a non-metallic per-rions filling'capablel oi preventing the collapse or serious displacement of the I filtering lWalls, While at the sa'nieytime affording a free passage for they filtered solution. lvletallic-lillings as iron Wire7 etc., are objectionable as exhibiting a tendency to react with or dissolve in the solution used, under certain conditions, and also by reason of their tendency to: cori-ode and to cause the decay of. the liltering sack's, or otherwise to weaken th'eni; further more such llings decrease the ltering capacity of the cloths by obstructing their iritcrstices @ne filling material which have found suitable of this purpose ,Vis cocoa matting, which may be flexed to iorm a filing or otherwise disposed. A lilling of this character-is indicated at l1 in the figure. As modified mesnsffor supporting the filter Walls .1 have also shown in the figure a sfa `strip' l2, conveniently of Wood, o which any required number may be used, the several tial displacement thereof While providing the maximum practicable filtering area. 0n the cells may be lled or packed with str'ips,"oloclts orpiec'es o Wood or other material which may be 'of irregular shape and of uniform size as shown at 1,3 in the figure. In allcases the essential feature is the vprovision of a filling capable ol supporting the walls or'preventing substan a free pas. sage Way for the filtered liquid.

14 represents a iltering layer preferably of canvas,` disposed. over the converging bottom 2 of the tank and shown as secured by cleats or strips l5. Beneath this ltering laye-1914 I may alsodispose a spacing layer or filling of cocoa matting or other suitable material. The

'main conduit'l communicates through a plurality of branch pipes 17 with the space or spaces beneath the filter 14. l y A The tank 1 is also provided vvith one or more cocks 18,

` disposed at variousleyels and serving todraivoff-clear Abut unfiltered solution 'as hereinafter described; a

sludge gate 19 permitstlie quick discharge of the contents'4 of the tank. 20 represents a manhole affording* access :to the lower portion of :the tank, and 21 represente abox or pipe through which the charge is fedtostrips being cut away at the sides als shown. to provide g.

the apparatus, and 22 trepresents the rod which operates the gate 19. l23 represents inletopenings for the pas* sage of liquid used in discharging the accumulated pulp ymass freni the frames 5.

The method may bepracticed by means or' the abovel 'described apparatus substantially as follows A charge p oi material is introduced into the tank through the box or pipe 2l. Wash water, barren .solution or the like leaching agent is introducedthrough pipe 16, passing by the 4several branchpipes 17 to the space or spaces beneath the filter or distributingidevice 14.-., The liquid so introduced passes upward through the body of i ore pulp and is discharged through, the filter cells 5. The liquid may he introduced at such rate, and so uni forinly distributed beneath the body oi ore pulp, este rise through the latter Without substantial disturbance oi theinass, any particles carried by the upwardly moving liquid current being separated therefrom by the filters 5. In case thedisplaced liquid is suhstamr tiallyclear, the same or any portion oi it may bedecanted through the cocks 18. i

9 lil It will be understood thatl in operating in this manner the filter leiser-ves as a very efiectivedistributer for the inilowing liquor, While the cells 5 serve to distribute the outflowing liquort By this even distribution of both iniiowing and outievv'ing liquor any tendency to the production of channels in the charge is,avoided,. and the displacement of the metal-bearing solution'or the like is rendered more rapid aswell as more effective.

After the pulp mass has been substantially separated from the metal bearing solutions, Wash Water is run into the frames by means of the openings 23, and the accumulztted pulp is discharged from the frames 5 and run out by means of the sludge gate 19.

I claim: f

1. The method of recovering solutions which consists in introducing' a liquid beneath n charge containing a. solid sind a solution, displacing the solution by the upward flow of such liquid,vand ltering and thereby withdrawing the displaced solution.. l

2. The method of recovering solutions which consists in introducing a liquid in a substmgially uniform manner benenill :i charge containing :i solid and a solution, displac- .ing the solution by the upward How of such liquid, :md 

